Is it possible to create a gcp cloud dns server that works like any regular dns eg 8.8.8.8 but has a list of blocked domains? The requirement is that the dns server when set should work with low latency from multiple countries. Is this a task that gcp's Cloud Dns service can handle for multiple users say 10,000+?
Google Cloud DNS provides name servers for only your domains. Cloud DNS is not a public recursive name server (public DNS resolver) similar to Google Public DNS.
Yes, Cloud DNS can support 10,000 queries per second. The concept of users does not exist for Cloud DNS.